Concept explainers
Videos
(a)
Interpretation:
Whether the statement “atoms are like small, hard sphere” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(b)
Interpretation:
Whether the statement “an atom is electrically neutral” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(c)
Interpretation:
Whether the statement “an atom consists mostly of empty space” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(d)
Interpretation:
Whether the statement “the subatomic particles of an atom are electrons, protons, and neutrons” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(e)
Interpretation:
Whether the statement “the mass of an electron is less than the mass of a proton” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(f)
Interpretation:
Whether the statement “the mass of a proton is about the same as the mass of a hydrogen atom” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
(g)
Interpretation:
Whether the statement “electrons, protons, and neutrons are electrically charged” is true or false is to be predicted. If it is false then the true statement is to be stated.
Concept introduction:
The universe is made up of number of materials that have different shapes, size, color and texture. The collective name given to the different materials is “matter”. Earlier according to philosophers, it was thought that every matter of this universe is made up of atom.
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Chapter 5 Solutions
Bundle: Introductory Chemistry: An Active Learning Approach, 6th + OWLv2, 1 term (6 months) Printed Access Card
- Which particles account for most of an atom’s mass?arrow_forwardHere are three fictitious elements and a molecular view of the atoms that compose them. The molar mass of the middle element, (b), is 25 grams per dozen (g/doz). (The atoms of these fictitious elements are much larger than ordinary atoms.) Based on the size of the atoms, do you expect the atomic masses of elements (a) and (c) to be greater than or less than (b)? How many atoms are present in 175 g of element (b)?arrow_forwardDetermine whether each statement that follows is true or false. a Dalton proposed that atoms of different elements always combine on a one-to-one basis. b According to Dalton, all oxygen atoms have the same diameter. c The mass of an electron is about the same as the mass of a proton. d There are subatomic particles in addition to the electron, proton, and neutron. e The mass of an atom is uniformly distributed throughout the atom. f Most of the particles fired into the gold foil in the Rutherford experiment were not deflected. g The masses of the proton and electron are equal but opposite in sign. h Isotopes of an element have different electrical charges. i The atomic number of an element is the number of particles in the nucleus of an atom of that element. j An oxygen 16 atom has the same number of protons as an oxygen17 atom. k The nuclei of nitrogen atoms have a different number of protons from the nuclei of any other element. l Neutral atoms of sulfur have a different number of electrons from neutral atoms of any other element. m Isotopes of different elements that exhibit the same mass number exhibit similar chemical behavior. n The mass number of carbon 12 atom is exactly 12g. o Periods are arranged vertically in the periodic table. p The atomic mass of the second element in the farthest right column of the periodic table is 10u. q Nb is the symbol of the element for which Z=41. r Elements in the same column of the periodic table have similar properties. s The element for which Z=38 is in both Group 2A/2 and the fifth period.arrow_forward
- Give the complete symbol (XZA), including atomic number and mass number, of (a) a nickel atom with 31 neutrons, and (b) a tungsten atom with 110 neutrons.arrow_forwardWhat are the different kinds of particles in the atoms nucleus? Compare their properties with each other and with those of an electron.arrow_forwardThe natural abundances and isotopic masses of the element neon (Ne) are Calculate the atomic mass of naturally occurring neon.arrow_forward
- How do isotopes of a given element differ? How are they similar?arrow_forwardArgon has three naturally occurring isotopes: 0.3336% 36Ar, 0.063% 38Ar, and 99.60% 40Ar. Estimate the average atomic mass of argon. If the masses of the isotopes are 35.968 u, 37.963 u, and 39.962 u, respectively, calculate the average atomic mass of natural argon.arrow_forwardXenon An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope’s mass number?arrow_forward
- Define mass number. What is the difference between mass number and atomic mass?arrow_forwardDefine the term atomic weight. Why might the values of atomic weights on a planet elsewhere in the universe be different from those on earth?arrow_forwardThe mass of an atom is almost entirely contributed by its a. nucleus. b. protons. c. electrons and protons. d. neutrons.arrow_forward
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